Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02K—JET-PROPULSION PLANTS
  • F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
  • F02K1/54—Nozzles having means for reversing jet thrust
  • F02K1/76—Control or regulation of thrust reversers
  • F02K1/763—Control or regulation of thrust reversers with actuating systems or actuating devices; Arrangement of actuators for thrust reversers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
  • F05D2230/00—Manufacture
  • F05D2230/60—Assembly methods
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T403/00—Joints and connections
  • Y10T403/70—Interfitted members
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T74/00—Machine element or mechanism
  • Y10T74/20—Control lever and linkage systems
  • Y10T74/20396—Hand operated
  • Y10T74/20402—Flexible transmitter [e.g., Bowden cable]
  • Y10T74/2045—Flexible transmitter [e.g., Bowden cable] and sheath support, connector, or anchor

Definitions

• the present invention relates, on the one hand, to a method of fixing a flexible transmission shaft in a front frame of a thrust reverser, said front frame being made using two semi-circular half-open elements and on the other hand, a thrust reverser comprising at least one transmission shaft fixed according to this method.
• the role of a thrust reverser is to improve the braking capacity of an aircraft by redirecting forward at least a portion of the thrust generated by the turbojet engine.
• the inverter obstructs the gas ejection nozzle and directs the ejection flow of the engine towards the front of the nacelle, thereby generating a counter-thrust which is added to the braking of the wheels of the engine. the plane.
• the structure of an inverter comprises movable covers movable between, on the one hand, an extended position in which they open in the nacelle a passage intended for the deflected flow, and on the other hand, a position retraction in which they close this passage.
• These mobile hoods may furthermore perform a deflection function or simply the activation of other deflection means.
• these movable covers are actuated by jacks controlled by drive systems fixed in the front frame of the thrust reverser.
• the front frame is formed from two semi-circular elements in which are fixed the different drive systems.
• the connection between two drive systems respectively arranged in one and the other of the two semicircular elements is provided by means of a flexible transmission shaft.
• the latter has, on the one hand, a first end attached to the drive system located on one of the two elements, and secondly, a second end attached to the other element.
• the object of the present invention is to overcome the drawbacks mentioned above, and for this purpose consists in a method of fixing a flexible transmission shaft in a front frame of a thrust reverser, said front frame being made with the aid of two semi-circular half-open elements, this method comprising a step during which a first end of said transmission shaft is attached to a drive system fixed in a front frame member, characterized in that it comprises the steps of :
• a step is substituted during which a fixing sleeve is all simply introduced into force in the housing of the associated mounting bracket, which ultimately allows to keep the transmission shaft in a predetermined position.
• this fixing sleeve can be monoblock or can be achieved using several adapted parts.
• a fixing support is positioned between the two partially open elements constituting the front frame. In addition, these two Elements are usually ajar at the top of the thrust reverser.
• each attachment sleeve capable of cooperating with complementary positioning means formed in the associated fixing support.
• each attachment sleeve may comprise at least one groove in which can engage a bead presented by the associated fixing medium.
• the present invention also relates to a thrust reverser used in aeronautics having a front frame comprising two semicircular elements equipped with at least one flexible transmission shaft having, on the one hand, a first end attached to a system in a constituent element of the front frame, and secondly, a second end attached to a drive system fixed in the other element, characterized in that at least one fixing sleeve is positioned around the transmission shaft, and in that each fixing sleeve is forcefully introduced into a housing presented by an associated fastening support secured to said thrust reverser, in order to maintain the transmission shaft in a predetermined position.
• each fixing support comprises a sheath defining a housing of substantially circular section.
• this sheath preferably has a longitudinal opening whose passage section is slightly greater than the diameter of the transmission shaft.
• each fixing sleeve is of circular section and has a diameter slightly greater than that of the sheath of the associated fixing support.
• each fixing sleeve is provided with at least one positioning means adapted to cooperate with a complementary positioning means presented by the associated fixing support.
• each attachment sleeve may comprise at least one groove in which is engaged a bead presented by the associated fastening support.
• each attachment sleeve may have first and second chamfered ends.
• Figure 2 is a view similar to that shown in Figure 1, once the drive shaft is properly attached;
• Figure 3 is a partial perspective view of a transmission shaft provided with a fixing sleeve and an associated fixing support.
• FIG. 4 is a partial front view of the transmission shaft and the fixing support shown in FIG. 3.
• FIG. 5 is a view similar to FIG. 4, once the transmission shaft is engaged in the mounting bracket.
• Figure 6 is a view similar to Figure 4, once the attachment sleeve is engaged in the mounting bracket.
• Figure 7 is a sectional view along the line VII-VII of Figure 6.
• a front frame 1 of a thrust reverser is made using two elements 2, 3 semi-circular to which are attached longitudinal panels (not shown). Depending on whether the thrust reverser is doors or grids, these panels are then respectively fixed or movable in translation. Whatever the configuration, the front frame 1 is equipped with cylinders 4, 5 whose function is, as the case may be, to deploy deflection doors, or to move the movable panels in translation which are connected by deflection grids.
• cylinders 4, 5 are controlled by drive systems 7, 8 respectively fixed in the elements 2, 3 of the front frame
• a fixing sleeve 10 defining a channel whose inner diameter is very slightly greater than that of the transmission shaft 9, is slid along the latter.
• This attachment sleeve 10, as shown in FIGS. Figures 3 to 7, is made of rubber and comprises, on the one hand, a central zone 11 surrounded by two grooves 12, and on the other hand, two chamfered ends 13.
• a metal fastening support 14 is also secured to the connecting rod 6 ensuring the connection between the two elements 2, 3. When they are ajar, the fixing support 14 is positioned between the two elements 2, 3, and thus remains in the field of view of the staff.
• this fixing support 14 is broken down, on the one hand, into a base 15 screwed into the connecting rod 6, and on the other hand, into a sheath 16 of circular section having two longitudinal edges 17 defining a longitudinal opening.
• the sheath 16 is integral with the base 15, and is designed to have a certain radial elasticity.
• this sheath 16 is equipped with beads 18 intended to cooperate with the grooves 12 of the sleeve 10.
• the two edges 17 are spaced from one another by a distance which is greater than the diameter of the transmission shaft 9, but smaller than the largest diameter of the fixing sleeve 10.
• the diameter of the sheath 16 is smaller than the largest diameter of the fixing sleeve 10.
• This operator then only has to insert the attachment sleeve 10 into the sheath 16 of the attachment support 14 so that the transmission shaft 9 is perfectly held in position.
• it first introduces a portion of the transmission shaft 9 located downstream of the attachment sleeve 10 into the sheath 16.
• the operator can exercise a greater traction to force the fastening sleeve 10 to slide in the sheath 16.
• the latter is then deformed radially and its beads 18 are ultimately forced to penetrate in one of the two grooves 12 of the attachment sleeve 10.
• the latter and the transmission shaft 9 are then perfectly maintained in position in the front frame 1.
• an obvious variant embodiment of the invention may consist in the fact that the operator proceeds to insert the fixing sleeve 10 into the associated fixing support 14 before connecting the second end 20 the drive shaft 9 to the drive system 8.

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• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• General Details Of Gearings (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=34953675

Family Applications (1)

Country Status (7)

Families Citing this family (3)

Family Cites Families (6)

• 2005
  • 2005-01-21 FR FR0500623A patent/FR2881183B1/fr not_active Expired - Fee Related
  • 2005-12-15 RU RU2007130231/06A patent/RU2007130231A/ru not_active Application Discontinuation
  • 2005-12-15 CN CN200580043782.6A patent/CN101084370A/zh active Pending
  • 2005-12-15 US US11/791,039 patent/US20080041184A1/en not_active Abandoned
  • 2005-12-15 WO PCT/FR2005/003136 patent/WO2006077290A1/fr active Application Filing
  • 2005-12-15 CA CA002588578A patent/CA2588578A1/fr not_active Abandoned
  • 2005-12-15 EP EP05826574A patent/EP1838957A1/fr not_active Withdrawn

Non-Patent Citations (1)

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